2006 - 2007 Texas Influenza Surveillance Information

Influenza Surveillance Report for MMWR Week 1

The flu activity level for the week ending January 6, 2007 is “regional”. Regional activity indicates that 2 or more but less than half of the regions are experiencing an increase in ILI and lab-confirmed (by culture) flu has been identified in those regions.

Reports were received from all 11 Health Service Regions (HSRs) for week 1. HSRs 1, 6/5S, and 9/10 reported an increase in flu activity from the previous week. For a map of Health Service Regions, please visit the following website:

http://www.dshs.state.tx.us/regions/state.shtm

No institutional outbreaks or school closures were reported for week 1.

Sixty-four sentinel providers reported influenza-like illness (ILI) for week 1. Of all patient visits during this week, 4.92% were due to ILI. The baseline for Texas is 3.71%. The baseline is the mean percentage of patient visits for ILI during non-influenza weeks for the previous three seasons plus two standard deviations.

Percentage of Influenza-Like Illness (ILI) Reported by Sentinel Providers in Texas as of 01/12/07

Week

# Reporting

Age 0-4

Age 5-24

Age 25-64

Age over 64

Total ILI

Total Patients

% ILI

2006-40

60

71

120

65

9

265

15228

1.74

2006-41

58

104

126

93

14

337

16202

2.07

2006-42

76

250

187

154

44

635

24995

2.54

2006-43

76

219

188

153

20

580

23063

2.51

2006-44

71

235

254

164

39

692

22374

3.09

2006-45

70

356

249

182

42

829

22458

3.69

2006-46

70

495

312

228

62

1097

23837

4.60

2006-47

75

450

227

236

95

1008

19782

5.09

2006-48

77

442

275

301

70

1088

24189

4.49

2006-49

83

374

325

283

96

1078

24010

4.48

2006-50

71

387

380

252

80

1099

21973

5.00

2006-51

64

349

256

177

50

832

16562

5.02

2006-52

61

460

199

264

104

1027

15868

6.47

2007-01

64

324

183

242

72

821

16664

4.92

Percentage of Physician Visits Due to Influenza-Like IllnessTexas Sentinel Providers Surveillance Network2006-2007 Season